Which expression is equivalent to 6 to the power of 6 times 6 to the power of -9

What is the range for 31,39,29,34,37,24,36,33,34,28

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)